Earth, Moon, Gravity Video Review and Reflections

Which best describes and orbit?

• A straight line towards a celestial body.
• A random path through space without any force.
• A circular motion without any gravitational influence.
• The path an object travel around another object.

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The moon is a

• natural satellite
• comet
• star
• planet

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The moon orbits the

• Earth
• Jupiter
• Venus
• Mars

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Which definition best describes gravity?

• Gravity is the curvature of space caused by mass.
• Gravity is the force that attracts two bodies towards each other.
• Gravity is the force that repels two bodies from each other.
• Gravity is the speed at which objects fall.

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How many moons does the Earth have?

• 1
• 4
• 3
• 2

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Chunks of Earth were blasted into space and came together to from

• Mars
• the Moon
• Venus
• Gravity

A space body that orbits a planet or planet like object is called a

• satellite
• planet
• comet
• asteroid

How do satellites orbiting the Earth communicate with us?

• Satellites send messages via smoke signals.
• Satellites use fiber optic cables to communicate with us.
• Satellites communicate through visual signals like flags.
• Through our phones

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Why don't things that orbit the Earth, crash into the Earth?

• They are held in place by gravity alone.
• They are constantly being pushed away by the Earth's atmosphere.
• They are made of materials that repel the Earth.
• The balance between an objects velocity and gravitational pull causes objects to stay in orbit.

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What would happen if the Moons speed was slower?

• The Moon would orbit the Earth faster, causing more frequent eclipses.
• The Moon would become a permanent fixture in the sky, never moving.
• The Moon's gravity would increase, pulling the Earth closer to it.
• Earth's gravity would be able to pull it down.

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